Under-water exhaust and muffler.



J. 0. SMITH. UNDER WATER EXHAUST AND MUFFLER.

APPLICATION FILED AUG. 12, 1810.

977,976. Patented Dec. 6, 1910' 2 SHEETS-SHEET 1.

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J. 0. SMITH.

UNDER WATER EXHAUST AND MUFFLER.

APPLICATION FILED AUG. 12. 1910.

Patented Dec. 6, 1910.

2 SHEBTS-SHEET-2 "'ll"l"""illl J- 4 c A 37 1 L M Wm n Aw l figures inIEEFafientefl. Dec. 35, 15231).

AN a'ten'r.

Specification of Letters .1 I. l H...

Y U1- ITED STATES PATENT OFFICE.

J O H N O UNDER--\VATER El .PT'LQHZ.

Application filed.

tltates. yesishn and. in HM; m it Wand .1 B 1 x u He m PH 2 8 e Q LIL Si U l 1 1.). 03 X n V Gm O 1 H 2. 0&

Jein pmto receive fitting of lug.

nu e he ex fey seme time line in yachts and.

nchmen'is or iilzth'lgs 1 Le slim of hull pip e passes thmn everymstzmee the 01 1- 0f the e11 erefore was he 0b the engine, a

the pewe and (h It is i only remove the 13m gine but to actuzflly apenin Whi eh i 1 botte glue 1 is s water exhaust fittmg.

he s: seetlenzfl View through the f flisg'.

mtion 0f planking. plankmg 5 1s a plan showln order to insure a properdistribution of the exhaust through all of the side ports or openings 8the chamber 10 decreases in depth as it progresses rear 'ardly, whilethe battle plates 9 increase in length in their rearward progressionwhich graduall dc creases the width of the passage 12 toward the rear ofthe fitting, this gradual reduction in area of the chamber 10 insures auniform dispcsition ot' the exhaust through all of the ports or openingsin the fitting and as the combined area of said ports are as beforestated largely in excess of the areas of the ex taust pipe l-t, backpressure on the engine is eliminated while the particular form andarrangement of the ports and battle plates creates an aspirating actionwhich maintains the pressure within the chamber 10 less than atmosphericthus relieving the exhaust from the back pressure to which it would besubjected it open to the atmosphere.

Having thus fully described the invention what is claimed as new andwhat is desired to secure by Letters Patent of the United States is- 1.An underwater exhaust fitting comprising a bottom and sides forming achamber, the said chamber decreasing in depth as it progresses to therear of the fitting, the upper edge or each side of the fitting beingprovided with a plurality of ports or openings tapered in such mannerthat the greatest depth of said ports or openings is at the rear endsthereof, a plurality of battle plates obliquely disposed within the saidchamber and arranged to deflect the exhaust through the said ports oropenings, the said batlle plates increasing in length in their rearwardprogression in such manner as to form a tapering passage in the fittingand a pluralit oi. ports or openings arranged one after the other in thebottom of the fitting.

2. An underwater exhaust fitting compris ing a chamber to receive theexhaust, said chamber decreasing in depth as it progresses toward therear of the fitting, a plurality of tapered ports or openings along thetop of the chamber at each side thereof, a plurality of battle plates'ithin the chamber and assoeiated with said ports or openings to deflectthe exhaust therethrough, and a port or opening in the bottom of thechamber.

An underwater exhaust fitting comprising a chamber, a plurality of portsor openings in each side of said chamber, av port or opening in thebottom of the chamber and a plurality of battle plates within thechamher and associated with the ports or openings in the sides thereofto deflect the exhaust from the chamber through said ports or openings.

An underwater exhaust comprising a chamber provided with a plurality ofports or openings in each side thereof, and a plurality of battle platesassociated with said. ports or openings to deflect the exhaust throughsaid ports or openings.

In testimony whereof, I aflix my signature, in presence of twowitnesses.

JOHN 0. SMITH.

Witnesses J. F. LEITCI-I, V. C. GEORGE.

